Bulan may refer to:

Geography
Mythology
  • Bulan, another name for Mayari, a moon goddess in Tagalog mythology.
People
  • Bulan (Khazar), a Khazar ruler of the eighth or ninth century CE, who converted to Judaism
Languages
  • Bulan or Buwan means 'moon' in several Austronesian languages
  • Bulan, a word in Romanian, is a long object like a club or a leg, sometimes used in slang as "pulan" (to resemble the slang word for penis) especially for Police baton. It's also used in expressions like "a avea bulan" (literally, to have bulan) meaning "to be lucky" or derived as "bulănos" ("who has thick legs" or "who is lucky") or "bulangiu" (slang word for "homosexual").